时间:2019-02-23 作者:英语课 分类:英语时差8,16


英语课

A lot of people love that fresh-dirt smell. The surprising thing, though, is that it isn’t coming from the dirt itself. Microbiologists have traced the pleasant odor to an organic chemical called “geosmin.” A microbial geneticist named Keith Chater at the John Innes Center in England has traced geosmin down to a common bacterium 2 called Streptomyces coelicolor. He even found out exactly which gene 1 in the little critters causes them to produce geosmin. Interestingly enough, there are unconfirmed reports that animals are attracted to fresh dirt in the desert, and go there looking for water. As they nose around the dirt, they pick up plenty of S. coelicolor, which then hitch 3 a ride from one oasis 4 to the next. If it’s true, then the bacteria in general may create the odor in order to attract animals. The animals find water, the bacteria are spread, and everyone is happy.



n.遗传因子,基因
  • A single gene may have many effects.单一基因可能具有很多种效应。
  • The targeting of gene therapy has been paid close attention.其中基因治疗的靶向性是值得密切关注的问题之一。
n.(pl.)bacteria 细菌
  • The bacterium possibly goes in the human body by the mouth.细菌可能通过口进入人体。
  • A bacterium is identified as the cause for his duodenal ulcer.一种细菌被断定为造成他十二指肠溃疡的根源。
v.免费搭(车旅行);系住;急提;n.故障;急拉
  • They had an eighty-mile journey and decided to hitch hike.他们要走80英里的路程,最后决定搭便车。
  • All the candidates are able to answer the questions without any hitch.所有报考者都能对答如流。
n.(沙漠中的)绿洲,宜人的地方
  • They stopped for the night at an oasis.他们在沙漠中的绿洲停下来过夜。
  • The town was an oasis of prosperity in a desert of poverty.该镇是贫穷荒漠中的一块繁荣的“绿洲”。
学英语单词
aggravatest
amynthas catenus
and then
angle fron
antipolarity (ito & crawford 1965)
attenuation cross-section
autonomous tariff
awfulizes
barnacle
bloodflow
blue-light special
bordalour
bostonite
break matrimony
brisket saw
Building Wire
carbonometers
Ch'eno
circulating-water valve
cloudnine
color mode
comovements
comparative spot
conform to
constant volume gas thermometre
copolymer fibre
cryogenic box
differential-mode input
drug administration agencies
ehrenkrantz
elk leather
excess draught
excessive bail
extrawide
face the truth
fdld
Finnfors
foot-and-mouth disease
Fu Hsi
glory-of-the-snow
godown entry
golden beryl
grid-pulse modulation
Gutondwa
hemangioma of uvula
high speed automatic fine puncher
hit the ball
Hkanbu
imposthumating
jed
kassas
lepper
make as if
narratorly
nomadic herding
noncholinergically
Noorvik
odontodesmology
orbital aneurysm
order of prohibition
pedagogizes
percussion composition
phakopsora fici
pierreponts
plain silkworm
polarized raman scattering
pressure scale height
Pro-Cal-Sof
proparaptera
puppet show theatre
put out of court
qbl
Quaker State
river wall
roman fleuves
self regulatory system
self-contained platform
short-delay detonator
sixth form
Sluiskil
software-transparent cache
sornidipine
sourceful
spearheaders
spinathricin
suhenofrontal crest
surprise dosage attack
system of power transmission
take sb's advice
tax discharged
theca-cell tumor
trickiness
two-time someone
unprovidedly
unpurifying
Uruburetama, Sa.da
vertical hill shading
Vickers diamond pyramid hardness test
wait accknowledge
washints
weighing buret(te)
weisner